/*
import java.awt.*;



import javax.swing.*;



import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import java.sql.Connection;

import java.sql.DriverManager;

        12 import java.sql.ResultSet;

        13 import java.sql.SQLException;

        14 import java.sql.Statement;

         import java.util.logging.Level;

        16 import java.util.logging.Logger;

        17

                18 import javax.swing.*;

        19 import javax.swing.event.MouseInputListener;
public class f {
}


        20

        21 public class B {

22

        23 public static void main(String[] args) {

        24 // TODO Auto-generated method stub

        25 // TODO Auto-generated method stub

        26 My_object1 my =new My_object1();

        27

        28 }

29

        30 }

31 class My_object1 extends JFrame{

32

        33 public JTextField j3;

34 public JTextField j4;

35 ImageIcon img = null;

36 JPanel p;

37 public My_object1(){

        38

        39 img = new ImageIcon( "C:\\用户\\zhangye123\\图片\\1569976476.jpg ");

        40

        41 setTitle("登录");

        42 setSize(200,150);

        43

        44 //、、JFrame j=new JFrame();

        45 JPanel p=new JPanel();

        46 LayoutManager icon = (LayoutManager) new ImageIcon("c:\\用户\\zhangye123\\图片\\1569976476.jpg");

        47

        48

        49 getContentPane().add(p);

        50

        51 JLabel j1=new JLabel("密码 ");

        52 JLabel j2=new JLabel("用户名");

        53 JLabel j7=new JLabel(img);

        54 j3=new JTextField(10);

        55 j4=new JTextField(10);

        56 JButton j5=new JButton("确定");

        57 JButton j6=new JButton("取消");

        58 p.add(j7);

        59 p.add(j2);

        60 p.add(j3);

        61 p.add(j1);

        62 p.add(j4);

        63 p.add(j5);

        64 p.add(j6);

        65 j6.addActionListener(new ActionListener() {

66

        67 @Override

68 public void actionPerformed(ActionEvent e) {

                69 // TODO 自动生成的方法存根

                70 if(e.getActionCommand().equals("取消")){

                    71 System.exit(0);

                    72 }

                73 }

74 });

        75 // final String userName = "abc";

        76 //final String passwrod = "123";

        77

        78 j5.addMouseListener(new Mouselen());

        79 setLocationRelativeTo(null);

        80 setVisible(true);

        81 }

82 class Mouselen implements MouseListener{

83

        84 @Override

85 public void mouseClicked(MouseEvent e) {

            86 // TODO Auto-generated method stub

            87 if(!j3.getText().equals("123456"))

                88 //System.out.println("用户名错误");

            89 JOptionPane.showMessageDialog(null, "账号错误");

            90 if(!j4.getText().equals("789"))

                91 //System.out.println("密码错误");

            92 JOptionPane.showMessageDialog(null, "密码错误");

            93 else //System.out.println("输入正确");

            94 //JOptionPane.showMessageDialog(null, "登录成功");

            95 {

                96 //System.exit(0);

                97 new guanli();

                98 }

            99 }

100

        101 @Override

102 public void mouseEntered(MouseEvent e) {

            103 // TODO Auto-generated method stub

            104

            105 }

106

        107 @Override

108 public void mouseExited(MouseEvent e) {

            109 // TODO Auto-generated method stub

            110

            111 }

112

        113 @Override

114 public void mousePressed(MouseEvent e) {

            115 // TODO Auto-generated method stub

            116

            117 }

118

        119 @Override

120 public void mouseReleased(MouseEvent e) {

            121 // TODO Auto-generated method stub

            122

            123 }

124

        125

        126 }

127

        128 }

129 class guanli extends JFrame{

130 JButton b1;

131 JButton b2;

132 public guanli(){

        133 setSize(550,370);

        134 Toolkit tk=getToolkit();

        135 Dimension d1=tk.getScreenSize();

        136 int w=(int)d1.getWidth();

        137 int h=(int)d1.getHeight();

        138 setLocation(w/2-550/2, h/2-370/2);

        139 setVisible(true);

        140 setTitle("信息管理系统");

        141 //Image img1=tk.getImage("./src/jame/1-140326154313.jpg");

        142 //setIconImage(img1);

        143 ImageIcon img2 = new ImageIcon("./src/jame/13.jpg"); //相对路径获取图片

        144 JLabel imgLabel = new JLabel(img2); //创建图片标签

        145 this.getLayeredPane().add(imgLabel, new Integer(Integer.MIN_VALUE));

        146 //为标签设置为容器最底层；getLayeredPane()作用是为容器添加深度，允许组件互相重叠；Integer.MIN_VALUE最底层

        147 imgLabel.setBounds(0,0,img2.getIconWidth(), img2.getIconHeight());

        148 Container cp=getContentPane(); //获取顶级容器

        149 ((JPanel)cp).setOpaque(false); //设置透明以使底层背景图片显示

        150 cp.setLayout(null);

        151

        152 JLabel imgLable=new JLabel();

        153 JLabel j2=new JLabel("***欢迎登陆学生管理系统***");

        154 JLabel j1=new JLabel("~~请在左侧选择所做的操作~~");

        155 JButton b1=new JButton("查询");

        156 JButton b2=new JButton("取消");

        157 JButton b3=new JButton("修改");

        158 JButton b4=new JButton("增添");

        159 JButton b5=new JButton("删除");

        160 JTextArea t3=new JTextArea(150,150);

        161 cp.add(j2);

        162 j2.setBounds(220,110,190,25);

        163 cp.add(j1);

        164 j1.setBounds(220,150,190,25);

        165 cp.add(b1);

        166 b1.setBounds(0, 70, 90, 25);

        167 cp.add(b2);

        168 b2.setBounds(250, 250, 70, 25);

        169 cp.add(b4);

        170 b4.setBounds(0,110,90,25);

        171 cp.add(b3);

        172 b3.setBounds(0,150,90,25);

        173 cp.add(b5);

        174 b5.setBounds(0,190,90,25);

        175 b2.addActionListener(new ActionListener() {

176

        177 @Override

178 public void actionPerformed(ActionEvent e) {

                179 // TODO 自动生成的方法存根

                180 if(e.getActionCommand().equals("取消")){

                    181 System.exit(0);

                    182 }

                183 }

184 });

        185 b1.addActionListener(
                new ActionListener() {

186

        187 @Override

188 public void actionPerformed(ActionEvent e) {

                189 // TODO 自动生成的方法存根

                190 new chaxun();

                191

                192 }

193 }
);

        194 b3.addActionListener(new ActionListener() {

195

        196 @Override

197 public void actionPerformed(ActionEvent e) {

                198 // TODO 自动生成的方法存根

                199 new xiugai();

                200

                201 }

202 });

        203 b4.addActionListener(new ActionListener() {

204

        205 @Override

206 public void actionPerformed(ActionEvent e) {

                207 // TODO 自动生成的方法存根

                208 new zengtian();

                209

                210 }

211 });

        212 b5.addActionListener(new ActionListener() {

213

        214 @Override

215 public void actionPerformed(ActionEvent e) {

                216 // TODO 自动生成的方法存根

                217 new shanchu();

                218

                219 }

220 });

        221 }

222 }

223

        224 class chaxun extends JFrame{

225 TextField t1;

226 TextField t2;

227

        228 public chaxun(){

        229 setTitle("查询");

        230 setSize(550, 370);

        231 JPanel p1=new JPanel();

        232 //getContentPane().add(p1);

        233 JLabel j1=new JLabel("学号： " );

        234 JLabel j2=new JLabel("姓名： ");

        235 JLabel j3=new JLabel("专业： ");

        236 TextField t1=new TextField(70);

        237 TextField t2=new TextField(70);

        238 TextField t3=new TextField(70);

        239 JButton b=new JButton("查询");

        240 JButton b1=new JButton("取消");

        241 ImageIcon img2 = new ImageIcon("./src/1-140326154313.jpg"); //相对路径获取图片

        242 JLabel imgLabel = new JLabel(img2); //创建图片标签

        243 this.getLayeredPane().add(imgLabel, new Integer(Integer.MIN_VALUE));

        244 //为标签设置为容器最底层；getLayeredPane()作用是为容器添加深度，允许组件互相重叠；Integer.MIN_VALUE最底层

        245 imgLabel.setBounds(0,0,img2.getIconWidth(), img2.getIconHeight());

        246 Container p11=getContentPane(); //获取顶级容器

        247 ((JPanel)p11).setOpaque(false); //设置透明以使底层背景图片显示

        248 p11.setLayout(null);

        249 p11.add(j2);

        250 j2.setBounds(50, 70, 70, 25);

        251 p11.add(t1);

        252 t1.setBounds(150, 70,100, 20);

        253 p11.add(j1);

        254 j1.setBounds(50, 150, 70, 25);

        255 p11.add(t2);

        256 t2.setBounds(150,150,100, 20);

        257 p11.add(j3);

        258 j3.setBounds(50,230,70, 25);

        259 p11.add(t3);

        260 t3.setBounds(150, 230,100, 20);

        261 p11.add(b);

        262 b.setBounds(400,140,90,25);

        263 p11.add(b1);

        264 b1.setBounds(400,170,90,25);

        265 setLocationRelativeTo(null);

        266 setVisible(true);

        267 final String url = "jdbc:mysql://localhost:3306/test";

        268 b1.addActionListener(new ActionListener() {

269

        270 @Override

271 public void actionPerformed(ActionEvent e) {

                272 // TODO 自动生成的方法存根

                273 if(e.getActionCommand().equals("取消")){

                    274 System.exit(0);

                    275 }

                276 }

277 });

        278 b.addActionListener(new ActionListener() {

279

        280 @Override

281 public void actionPerformed(ActionEvent arg0) {

                282 // TODO Auto-generated method stub

                283

                284

                285 try (Connection conn = DriverManager.getConnection(url,"root","1234"))

                286 {

                    287 Statement state = conn.createStatement();

                    288 ResultSet result = state.executeQuery("SELECT name FROM xuesheng");

                    289

                    290

                    291 } catch (SQLException ex) {

                    292

                    293 ex.getSQLState();

                    294 }

                295 }

296 });

        297 }

298 }

299

        300 class xiugai extends JFrame{

301 public xiugai(){

        302 setTitle("修改");

        303 setSize(550, 370);

        304 JPanel p1=new JPanel();

        305 getContentPane().add(p1);

        306 setLocationRelativeTo(null);

        307 setVisible(true);

        308

        309 }

310 }

311

        312 class zengtian extends JFrame{

313 public zengtian(){

        314 setTitle("增添");

        315 setSize(550, 370);

        316 JPanel p1=new JPanel();

        317 getContentPane().add(p1);

        318 setLocationRelativeTo(null);

        319 setVisible(true);

        320 }

321 }

322

        323 class shanchu extends JFrame{

324 public shanchu(){

        325 setTitle("删除");

        326 setSize(550, 370);

        327 JPanel p1=new JPanel();

        328 getContentPane().add(p1);

        329 setLocationRelativeTo(null);

        330 setVisible(true);

        331 }

332 }
————————————————
        版权声明：本文为CSDN博主「包阳明频道」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
        原文链接：https://blog.csdn.net/weixin_30019517/article/details/113288342
*/
